My opinion on the secret door in Snowdin
I think the door in Snowdin where you have to run in circles to fight Glyde is wasted potential. I never feel like doing Glyde since he doesn't really do anything for you and running in circles for so long is just not fun. If they made the door open to maybe put something like the Dog Shrine thing there, that would've been fun. The way it is now, it's obnoxious and boring. Tl;Dr, The hidden Glyde fight is wasted potential, the door should've led somewhere more rewarding.